反应详情

A stirred, cooled (-65~C) mixture of 2,6-dimethyl-2-methoxyhept-5-ene (125 g, 1.25 mol), methylene chloride (500 mL) and methanol (500 mL) was treated with a gas stream enriched with ozone. Upon the appearance of a blue color pure oxygen was passed through the mixture followed by nitrogen. Dimethyl sulfide (88 mL, 1.4 mol) was added and the mixture was allowed to stand 16 hours at 25~C. Upon workup 4-methoxy-4-methylpentanal was obtained, bp30 85-87~C (64.4 g); NMR(CDC13) 1.2(s,6H), 1.9(t,2H), 2.5(m,2H), 3.2(s,3H), 9.8(t,1H); IR(neat) 2975, 2825, 2725, 1730, 1470, 1370, 1090 cm-1 ; MS(m/e) 43, 73, 83, 115.

1. temperatureA stirred, cooled
2. additionwas treated with a gas stream